Fw: [xml] HTML push interface

["Nilo S. Mismetti" <nilo newpos com>]

----- Original Message -----
From: "Nilo S. Mismetti" <nilo newpos com>
To: <xml xmlsoft org>
Sent: quinta-feira, 18 de outubro de 2001 18:08
Subject: Re: [xml] HTML push interface


> Team,
>
> > From MSDN, about "fread":
>
> "The fread function reads up to count items of size bytes from the input
> stream and stores them in buffer. The file pointer associated with stream
> (if there is one) is increased by the number of bytes actually read. If
the
> given stream is opened in text mode, carriage return-linefeed pairs are
> replaced with single linefeed characters. The replacement has no effect on
> the file pointer or the return value."
>
> This means that the "res" value counts the \r that fread zaps and the poor
> "htmlParseChunk" tries to parse more characters than the ones transferred
by
> fread.
>
> One solution - Change the fread by fgets and do a strlen to obtain the
real
> number of chars.
>
> Nilo
> ----- Original Message -----
> From: "Marc Sanfacon" <sanm copernic com>
> To: <xml xmlsoft org>
> Sent: terça-feira, 1 de agosto de 2000 16:36
> Subject: [xml] HTML push interface
>
>
> > Hi there,
> > I am new to libxml (I've been using it for less than 1 week).  I
> > have written a C++ interface on top of it.  It is not yet finished, but
it
> > includes most features I need for now.  BTW, I am working under Windows
> 2000
> > using MSVC 6.0 SP3.
> >
> > I have tried to parse a file using the html push interface and have
> > strange results.
> >
> > Here is the code:
> >
> > FILE *f = fopen(CGL::ConvertString(p_FileName).c_str(), "r");
> > if (f != NULL) {
> >     int res, size = 4096;
> >     char chars[4096];
> >     htmlParserCtxtPtr ctxt;
> >
> >     res = fread(chars, 1, 4, f);
> >     if (res > 0) {
> >         ctxt = htmlCreatePushParserCtxt(NULL, NULL,
> >         chars, res, 0, static_cast<xmlCharEncoding>(0));
> >         InitContext(ctxt);
> >         while ((res = fread(chars, 1, size, f)) > 0) {
> >             htmlParseChunk(ctxt, chars, res, 0);
> >         }
> >         htmlParseChunk(ctxt, chars, 0, 1);
> >         pDoc = ctxt->myDoc;
> >         htmlFreeParserCtxt(ctxt);
> >     }
> >     fclose(f);
> > }
> >
> > This is mainly the code presented in 'testHTML.c' from the package,
except
> > that I use a bigger buffer.  In my tests, one strange thing happened.
> When
> > using a buffer large enough to fit one of my document, the result of the
> > parsing is not complete.  For now, I have only one document that does
this
> > effect and I have attached it to this email.
> >
> > For example, the document is 2001 bytes long.  When reading using fread,
> it
> > strips the '\r' so this gives a total of 1971 bytes.  When I put 1967
> (1971
> > - 4 bytes for the header) or more, I get the error, a big chunk from my
> > document is skipped, but if I put 1966 or less, the document is parsed
OK.
> > I even modified 'testHTML.c' to use buffer of 1967 bytes to ensure I was
> OK,
> > and I had the same error using: testHTML -debug -repeat -push doc2.htm
> >
> > Anyone can help me ?
> >
> > Regards,
> >
> > Marc.
> >
> >  <<doc2.htm>>
> >
> > ---------------------------------------------------------------------
> >  "If you choose not to decide, you still have made a choice."
> > Neil Peart
> > ---------------------------------------------------------------------
> > Marc Sanfacon, Software developer Copernic.com
> > e-mail: sanm copernic com R&D Group
> > Tel   : (418) 527-0528 ext 1212 ICQ #7355101